She says otherwise, Phase II is dependent on supporters raising $75 million in donations, which "will take a long time."

"These escalating costs include demobilizing the construction site once Phase I construction is complete and then remobilizing the site at a later date when Phase II construction starts. This creates a lot of inefficiencies and extra costs. In addition, there are costs associated with construction inflation, changing building codes, project scheduling to take into consideration constructing Phase II while Phase I is under active operation, and miscellaneous soft costs associated with reassembling the construction and oversight teams. Also, the current construction environment is highlighted by historically low inflation. Therefore any project delays could easily put us in a situation where Phase II costs are substantially higher due to a less favorable inflation environment," the memo says.

The money will come from tourism taxes and is a big boost to the project which has struggled with financing.

On Friday, Dr. Phillips Charities announced it would donate $10 million, so with the additional money from Orange County, the fundraising goal is down to $40 million. Monday's announcement brings the total contribution by Orange County to $164 million.

In the memo, Jacobs also addressed her stance on the possibility of hosting a Major League Soccer franchise in Orlando, which would require a specific stadium to be built seating about 20,000 people in the area's "urban core."

"While I am very enthusiastic about the potential of having an MLS team, I have some concerns about the estimated cost of the stadium, the expedited construction timeframe and the proposed finance plan," she said.

Jacobs said she believes the Orlando City Soccer Club should continue to play in the Citrus Bowl for now, unless "that option proves not to be viable due to the potential of losing state incentive funds."

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